Sky Tower Public Company Limited, together with its subsidiaries, provides infrastructure for electric power and telecom in Thailand. The company manufactures high-voltage transmission towers and substations, steel structures, and telecommunication towers. It also provides galvanizing services; and distributes power transmission equipment. In addition, it is involved in the operation of biomass plants; and trading and investing activities. Further, the company manufactures and sells agricultural products and woodchips, as well as sells industrial products. The company was formerly known as Ua Withya Public Company Limited and changed its name to Sky Tower Public Company Limited in July 2021. Sky Tower Public Company Limited was incorporated in 1967 and is headquartered in Bangkok, Thailand.